I don't remember what episode it was in but I love that moment in S2 when Willow was talking to someone then Buffy was like "Go ahead, you know you want to," and Willow was like "My boyfriend is coming!" (or something like that) it was so cute. Especially after the way Xander was treating her and rejecting her (and being with her bullying enemy Cordelia over her) I'm glad Willow had Oz.